"Gratitude is a duty which ought to be paid, but which none have a right to expect.

Gratitude is a duty which ought to be paid but which none have a right to expect.
Gratitude is a duty which ought to be paid but which none have a right to expect.
Gratitude is a duty which ought to be paid but which none have a right to expect.
Gratitude is a duty which ought to be paid but which none have a right to expect.